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Expired Canadian patentCanada

Switch for projectile accelerating system

CA 904697 A · Owner: Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defence Of Her Majesty'S Canadian Government · Inventors: Frank T. Hubbard; Gaston Demers

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

No Claude kit for weapons

Claude doesn't help design weapons, ammunition or explosives, so this page has no Reinvent kit. To develop this one, work with a federally licensed manufacturer (many of these items are regulated) and a registered patent attorney or agent, listed on the USPTO roster.

Read the whole patent

Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents.

Why it's free to use

  • Granted July 11, 1972. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 11, 1989.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJuly 11, 1972
Term endedJuly 11, 1989
Patent numberCA 904697 A
Classification (IPC)F41F1/00 +1 more

Timeline

Timeline From CIPO dates

197319751977197919811983198519871989Patent grantedJuly 11, 1972Term endedJuly 11, 1989

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.